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/* orinoco_hopper.c
* orinoco wireless nic channel scanning utility
*
* By Snax <snax@shmoo.com>
* Copyright (c) 2002 Snax
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* For a copy of the GNU General Public License write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <signal.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/wireless.h>
#include <unistd.h>
#include <getopt.h>
#ifndef SIOCIWFIRSTPRIV
#define SIOCIWFIRSTPRIV SIOCDEVPRIVATE
#endif
void changeChannel(int);
int setChannel( unsigned char channel );
int max = 11;
int mode = 2;
char dev[32];
void changeChannel(int x) {
static int chan = 0;
chan = (chan % max) + 1;
setChannel(chan);
}
int setChannel( unsigned char channel )
{
int result = 0;
int fd;
struct iwreq ireq; //for Orinoco
int *ptr;
/* get a socket */
fd = socket(AF_INET, SOCK_STREAM, 0);
if ( fd == -1 ) {
return -1;
}
ptr = (int *) ireq.u.name;
ptr[0] = mode;
ptr[1] = channel;
strcpy(ireq.ifr_ifrn.ifrn_name, dev);
result = ioctl( fd, SIOCIWFIRSTPRIV + 0x8, &ireq);
close(fd);
return result;
}
void usage(char *cmd) {
fprintf(stderr,
"Usage: %s <iface> [-p] [-i <interval millisec>] [-n]\n -n = international channels\n -p = keep prism headers\n", cmd);
exit(1);
}
int main (int argc, char *argv[])
{
struct itimerval tval;
int ms, r;
//this will be the channel scanning interval, currently 0.2 sec
struct timeval interval = {0, 200000};
if (argc < 2) usage(argv[0]);
strncpy(dev, argv[1], 32);
dev[31] = 0;
while (1) {
r = getopt(argc,argv,"i:np");
if (r < 0) break;
switch (r) {
case 'n':
max = 14;
break;
case 'p':
mode = 1;
break;
case 'i':
ms = atoi(optarg);
interval.tv_sec = ms / 1000;
interval.tv_usec = (ms % 1000) * 1000;
break;
default:
usage(argv[0]);
}
}
//this sets up the kchannel scanning stuff
signal(SIGALRM, changeChannel);
tval.it_interval = interval;
tval.it_value = interval;
setitimer(ITIMER_REAL, &tval, NULL);
while (1) pause();
return 0;
}
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